Working with User Input

1
Working with User Input

• Business 92
• Spring 2008
• Roldan

2
Event Procedures

• Create event Procedures by
• Double-clicking on the relevant control
• Selecting the class and method names from the
  listboxes at the top of the code window
• Type in the relevant code or use code-snippets to
  start

Method
Control/Class
3
Working with other types of events

• The Form_Load event is a good event to associate
  with the baseline look of your form
• Code anatomy
• Button1.Enabled False
• Label1.Hide()

4
Combining events data retrieval in one form
5
Retrieving Data from Controls

• A new event Button1_MouseHover
• See page 136 for a table of Controls store
  control information, the property that you use to
  access the information and the type of data
  stored
• Conditional Statements like IfThen.Elseif.End
  help you use the informations to control how your
  application behaves
• Code Anatomy
• If CheckBox1.Checked And Not CheckBox2.Checked
  Then
• Label1.Text TextBox1.Text
• ElseIf CheckBox2.Checked Then
• Label1.Text "Please click Here"
• ElseIf CheckBox1.Checked And CheckBox2.Checked
  Then
• Label1.Text "Please click Here"
• End If
• Label1.Show()

6
Nice to have

• New event Button1_MouseLeave
• Code Anatomy Label1.Hide()

No Label whenmouse is not hovering over Button 1
7
Complete Code
8
Pull-Down Menus

• Use the Menustrip control in the Menus Toolbars
  category of the toolbar to add a menu to your
  application
• Type menu items in the areas marked Type Here
• Double-click on a menu item to associate code
  with it

9
Toolstrips

• Use the ToolStrip control located in the Menus
  Toolbars category of the Toolbox
• Click on the Add ToolStrip button to select tools
  to add from the pop up menu
• Double-click on a toolstrip tool to associate
  code with it

10
In Class Work

• Do the tutorials on pages 133, 136, 151 and 157
• Add the following to your application
• A pull down menu or toolstrip
• Code for an event other than a button-click
• A procedure that uses data retrieved from a
  control
• Important! Build the executable for your
  application and tutorials and place them in a
  folder named feb21